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혼합현실 기반 훈련보조체계의 육군 장병 훈련 컨텐츠 개발 방향 연구
이정열 육군사관학교 화랑대연구소 2022 한국군사학논집 Vol.78 No.2
The Korean Army is experiencing a change in soldier reduction following the implementation of Defense Reform 2.0, and with the trend of focusing on human life and human rights, it will face a very difficult situation in case of casualties during peacetime military training. This point of view, in the case of the U.S. and British forces, peacetime military training was analyzed as the main cause of the loss of life in the military. It is also developing a training assistance system that applies virtual reality technology to military training to reduce loss of life. In the case of the Korean Army, casualties occur every year during peacetime training, and even civilian casualties occur. Therefore, in order to reduce loss of life, a video shooting training simulator was introduced from 2014. Recently, It is developing a training assistance system that applies mixed reality technology to military training, but research on how to development contents of the training assistance system to training for soldiers is insufficient. Therefore, the purpose of this study is to provide training information on training contents and training preferences required for the Army. The results of this study are as follows. First, 11 training contents to be developed when a mixed reality-based training assistance system is used in the Army were identified through Army doctrine review. Second, the development direction of training contents expected by Army training experts was presented through the MDS(Multi-dimensional Scaling) analysis.
이정열,Lee, Jeong-Yeol 한국도서관협회 1975 圖協月報 Vol.16 No.8
본고는 1972년도 연세대학교 교육대학원 사서교육전공 석사학위논문의 요약이다.
Al_(0.3)Ga_(0.7)As/GaAs HEMT 구조에서의 Photoreflectance에 관한 연구
이정열,김기홍,배인호,박성배,신영남 대구대학교 기초과학연구소 2000 基礎科學硏究 Vol.16 No.2
The optical characteristics of Al_(0.3)Ga_(0.7)As/GaAs HEMT structure were investigated by using the photoreflectance method. From the PR measurement, 2DEG transition energy related signal were obtained by between GaAs buffer and Al_(0.3)Ga_(0.7)As/GaAs spacer layer at the temperature of below about 150 K. And the transition energy is shift to low energy about 21 meV. We obtained that 2DEG transition energy, interface field and carrier concentration are 1.455 eV, 5.26 × 10⁴ V/cm and 7.18 × 10⁴cm^(-3), respectively.
황처리된 GaAs표면의 Photoreflectance에 관한 연구
이정열,김인수,배인호,김말문,김규호 한국전기전자재료학회 1995 電氣電子材料學會誌 Vol.8 No.4
The surface of GaAs was treated by using the 0.1M solution of N $a_{2}$S.9 $H_{2}$O. The passivation of the surface in this sample was investigated by the photoreflectance(PR) experiment. The surface electric field( $E_{s}$) and built-in voltage( $V_{bi}$ ) discussed from Franz-Keldysh oscillation of PR signals. The density of surface states and Fermi level of GaAs treated with N $a_{2}$S.9 $H_{2}$O for 40min were determined 1.61*10$^{12}$ c $m^{-2}$ and 0.73eV. These values were about 15 and 10% smaller than those in untreated sample.e.
이정열 한국수자원학회 1994 물과 미래(한국수자원학회지) Vol.27 No.3
수직수문하의 경계층 흐름(boundary layer flow)이 경계고정좌표계(Boundary- Fitted Coordinate System)에서 무작위 소용돌이 판 방법(Random Vortex Sheet Method)과 요소내 소용돌이 방법(Vortex-in-Cell Method)을 이용하여 수치계산되었다. 수치해에 의한 수문을 따라 형성된 경계층이 수축률의 실험자료와 비점성이론에 의한 그 결과의 차이를 유발하는 주원인인 것으로 보여진다. 그 동안 주원인일 것으로 믿어왔던 바닥면 경게층의 역할은 수문면의 그 것보다는 적은 것으로 수치계산되었다. 또한 차원해석을 통하여 경계층 흐름에 의한 수축율의 그 차이가 수문 길이의 평방근에 반비례하는 것으로 추정되었으며, 이는 Benjamin(1956)에 의하여 분석된 것과 결국 동일한 것임이 밝혀졌다. 수치모델과 차원해석에 따른 결과는 Benjamin(1956)에 의해 얻어진 수축률의 실허미와 비교하여 만족할 만하였다. The boundary layer flow under a sluice gate is numerically solved by the random vortex sheet method combined with the vortex-in-cell method in a boundary-fitted coordinate system. The numerical solution shows that the boundary layer developed along the vertical sluice gate wall is the primary cause for the discrepancy in the contraction ratio between the laboratory experiments and inviscid theory; the bottom boundary layer plays much a smaller role in the discrepancy. By dimensional analysis it is concluded that the discrepancy is inversely proportional to the 3/4th power of the gate opening, as analyzed by Benjamin(1956). The results of the numerical simulation and dimensional analysis show a good agreement with experimental results obtained by Benjamin(1956).